<template>
<div>
  <!-- 面包屑导航区 -->
  <el-breadcrumb separator="/">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item><a href="/">商品管理</a></el-breadcrumb-item>
    <el-breadcrumb-item>商品分类</el-breadcrumb-item>
  </el-breadcrumb>
  <el-card>
    <el-row>
      <el-button @click="showAddCateDialog" type="primary">添加分类</el-button>
    </el-row>
    <!-- 表格 -->
    <tree-table class="table-margin" border :show-row-hover="false" :selection-type="false" show-index index-text="#" :expand-type="false" :data="catelist" :columns="column">
      <template slot="isok" slot-scope="scope">
        <i class="el-icon-success" style="color:lightgreen;" v-if="scope.row.cat_deleted ===false"></i>
        <i class="el-icon-error" style="color:red;" v-else></i>
      </template>
      <!-- 排序 -->
      <template slot="order" slot-scope="scope">
        <el-tag v-if="scope.row.cat_level===0">一级</el-tag>
        <el-tag v-if="scope.row.cat_level===1" type="success">二级</el-tag>
        <el-tag v-if="scope.row.cat_level===2" type="warning">三级</el-tag>
      </template>
      <!-- 模板 -->
      <template slot="opt">
        <el-button type="primary" icon="el-icon-edit">编辑</el-button>
        <el-button type="danger" icon="el-icon-delete">删除</el-button>
      </template>
    </tree-table>
    <!-- 分页区域 -->
    <el-pagination @size-change="handlesizeChange" @current-change="handleCurrentChange" :current-page="querInfo.pagenum" :page-sizes="[1,2,5,10]" :page-size="querInfo.pagesize" layout="total, sizes,prev,pager,next,jumper" :total="total">
    </el-pagination>
  </el-card>

 <!-- 添加分类对话 -->
  <el-dialog
  @close="addCatDialogClosed"
  title="添加分类"
  :visible.sync="addCateDialogVisible"
  width="50%">
  <!-- 添加分类表单 -->
  <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
  <el-form-item label="分类名称：" prop="cat_name">
    <el-input v-model="addCateForm.cat_name"></el-input>
  </el-form-item>
  <el-form-item label="父级分类：">
        <!--options 指定数据源 -->
        <!--props 指定配置对象 -->
        <el-cascader
          :clearable="true"
          v-model="selectedKeys"
          :options="parentxCateList"
          :props="{ expandTrigger: 'hover',...cascaderProps,checkStrictly:true}"
          @change="parentcateChanged"></el-cascader>
  </el-form-item>
  </el-form>
  <span slot="footer" class="dialog-footer">
    <el-button @click="addCateDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addCat">确 定</el-button>
  </span>
</el-dialog>
</div>
</template>

<script>
import { Message } from 'element-ui'
export default {
  data() {
    return {
      // 选中父级分类的id数组
      selectedKeys:[],
      // 指定级联选择器的配置项对象
      cascaderProps:{
        value:'cat_id',
        label:'cat_name',
        children:'children',
      },
      // 父级分类的列表
      parentxCateList:[],
      // 将要添加分类的规则
      addCateFormRules:{
        cat_name:[
          { required: true, message: '请输入分类名称', trigger: 'blur' },
        ]
      },
      // 添加分类的表单数据对象
      addCateForm:{
        cat_name:'',
        cat_pid:0,
        cat_level:0 
      },
      // 控制对话框
      addCateDialogVisible:false,
      catelist: [],
      // 查询条件
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      column: [{
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ]
    }
  },
  methods: {
    // 对话框关闭监听
    addCatDialogClosed(){
        this.$refs.addCateFormRef.resetFields()
        this.selectedKeys=[]
        this.addCateForm.cat_level=0
        this.addCateForm.cat_pid=0
    },
    // 确定按钮
    addCat(){
      this.$refs.addCateFormRef.validate(async valid=>{
        if(!valid) return
        const {data:res} = await this.$http.post('categories',this.addCateForm)
        console.log(res.data)
        if(res.meta.status!==201)
        {return this.$message.error('添加分类失败')}
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCateDialogVisible=false
      })
    },
    parentcateChanged(){
      // console.log(this.selectedKeys)
      // 如果seletedKeys中length长度大于0，证明选中了
      if(this.selectedKeys.length>0){
        // 父级分类的id
        this.addCateForm.cat_pid=this.selectedKeys[this.selectedKeys.length-1]
        // 为当前分类的等级赋值
        this.addCateForm.cat_level=this.selectedKeys.length
        return 
      }else{
         // 父级分类的id
        this.addCateForm.cat_pid=0
        // 为当前分类的等级赋值
        this.addCateForm.cat_level=0
      }

    },
    // 新增按钮处理函数
    showAddCateDialog(){
      this.getParentCateList()
      this.addCateDialogVisible=true
    },
    // 获取商品分类
    async getCateList() {
      const {
        data: res
      } = await this.$http.get('categories', {
        params: this.querInfo
      })
      if (res.meta.status != 200) {
        return this.$message.error('获取商品分类失败')
      }
      // console.log(res.data)
      this.catelist = res.data.result
      //  console.log(this.catelist)
      this.total = res.total
    },
    // 监听pagesize的改变
    handlesizeChange(newSize) {
      this.querInfo.pagesize = newSize;
      this.getCateList()
    },
    // 监听页码的改变
    handleCurrentChange(newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    // 获取父级分类列表
    async getParentCateList(){
      const {data:res} = await this.$http.get('categories',{params:{type:2}})
      if(res.meta.status!==200){
        return this.$message.error('获取父级分类数据失败')
      }
      this.parentxCateList = res.data
      // console.log(res.data)
    },
    
  },
  created() {
    this.getCateList()
  },

}
</script>

<style lang="less" scoped>
.table-margin{
  margin-top:15px ;
}
.el-cascader{
  width: 100%;
}


</style>
